package com.seezoon.eagle.dubbo.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

import com.seezoon.eagle.core.utils.NDCUtils;
/**
 * http filter
 * @author hdf
 *
 */
public class WebFilter implements Filter{

	@Override
	public void init(FilterConfig filterConfig) throws ServletException {
		
	}

	@Override
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
			throws IOException, ServletException {
		NDCUtils.push();
		chain.doFilter(request, response);
	}

	@Override
	public void destroy() {
		NDCUtils.clear();
	}

}
